CN114632691B

CN114632691B - Screening device for producing activated alumina

Info

Publication number: CN114632691B
Application number: CN202210328662.6A
Authority: CN
Inventors: 赖振威; 赖红; 王博
Original assignee: Pingxiang Kangyu New Energy Technology Co ltd
Current assignee: Pingxiang Kangyu New Energy Technology Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-05-02
Anticipated expiration: 2042-03-30
Also published as: CN114632691A

Abstract

The invention relates to the technical field of screening devices, and discloses a screening device for producing activated alumina, which solves the problems that a screening machine is needed in the process of producing activated alumina, filtering and sorting are needed, the existing screening machine is inconvenient to clean substances which do not pass through a filter screen, the filtering effect is general, and the actual use is inconvenient; the material of being convenient for filters through the filter screen for the filter effect is better, is convenient for take out the material that does not pass through the filter screen, makes things convenient for actual operation.

Description

Screening device for producing activated alumina

Technical Field

The invention belongs to the technical field of screening devices, and particularly relates to a screening device for producing activated alumina.

Background

Activated alumina, also known as activated alumina, is a porous, highly dispersed solid material having a large surface area, and its microporous surface has characteristics required for catalytic action, such as adsorption performance, surface activity, excellent thermal stability, etc., and thus is widely used as a catalyst and a catalyst carrier for chemical reactions.

In the process of producing the activated alumina, a screening machine is needed to filter and sort the activated alumina, the existing screening machine is inconvenient to clean substances which do not pass through a filter screen, and the filtering effect is general and is inconvenient for practical use.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the screening device for producing the activated alumina, which effectively solves the problems that in the prior art, a screening machine is needed in the process of producing the activated alumina, the screening machine is used for filtering and sorting the activated alumina, the existing screening machine is inconvenient to clean substances which do not pass through a filter screen, the filtering effect is general, and the actual use is inconvenient.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a screening device that production active alumina used, includes the base, the top of base is equipped with the screening case, the mounting hole has been seted up to the bottom inner wall of screening case, be equipped with the filter screen in the mounting hole, the bin outlet has been seted up to the one side inner wall of screening case, first rectangular hole has been seted up to the top inner wall of bin outlet, one side of screening case is equipped with the baffle with bin outlet matched with baffle, be equipped with the baffle in the bin outlet, the top of baffle runs through first rectangular hole, baffle and screening case pass through and shake the joint subassembly and connect, the bottom of screening case is equipped with the row material pipe, the both sides of screening case all are equipped with vibrating motor, the top of base is equipped with first collecting box and second collecting box, the bottom of screening case is equipped with shake slope subassembly;

the shake slope subassembly is including setting up in backup pad and the rotor plate of screening case below, backup pad and rotor plate are all connected with the screening case through a plurality of supporting springs, the bottom of backup pad is connected through two first support columns with the base, backup pad and rotor plate are connected through rotating the unit, the top fixedly connected with two second support columns of base, the second support column is connected through the anti-rotation lock subassembly with the rotor plate, the top of base is equipped with hydraulic telescoping cylinder, hydraulic telescoping cylinder's top is equipped with the push pedal, the push pedal is located the bottom of rotor plate, the top of rotor plate is equipped with the layer board, layer board and base pass through inclination lift adjustment subassembly and connect.

Preferably, the anti-rotation locking assembly comprises two clamping grooves formed in the bottom of the rotating plate, a groove is formed in the top of the second supporting column, a sliding block is arranged in the groove, a second rectangular hole is formed in the inner wall of one side of the groove, and a first handle is fixedly connected to one side of the sliding block.

Preferably, a limit hole is formed in one side of the sliding block, a through hole is formed in the inner wall of one side of the groove, a first fixing disc is arranged on one side of the second supporting column, a limit column is fixedly connected to one side of the first fixing disc, an extension spring is sleeved outside the limit column, and two ends of the extension spring are fixedly connected with the second supporting column and the first fixing disc respectively.

Preferably, the top of slider is located the draw-in groove, and first handle runs through the second rectangular hole, and the through-hole is run through to the one end of spacing post, and the one end of spacing post is located spacing downthehole, and the outside cover of first fixed disk is equipped with the antiskid cover.

Preferably, the inclination lifting adjusting assembly comprises a threaded column, the threaded column penetrates through the supporting plate, the threaded column is connected with the supporting plate in a threaded mode, the bottom end of the threaded column is connected with the base through a first bearing, the top of the base is fixedly connected with a fixing column, and the fixing column penetrates through the supporting plate.

Preferably, the outside cover of fixed column is equipped with the holding ring, holding ring and fixed column fixed connection, the top fixedly connected with second fixed disk of fixed column, and the top of layer board is equipped with first fly leaf, and the fixed column runs through first fly leaf, and the outside cover of fixed column has first compression spring, and first compression spring's both ends respectively with first fly leaf and second fixed disk fixed connection, the gear hole has been seted up at the top of first fly leaf, the top fixedly connected with gear of screw thread post.

Preferably, the bottom of the first movable plate is contacted with the top of the supporting ring, the gear is positioned in the gear hole, and the threaded column is provided with a second handle.

Preferably, the rotation unit comprises connecting plates symmetrically arranged on two sides of the rotation plate, the connecting plates are fixedly connected with the rotation plate, the two sides of the support plate are fixedly connected with fixed shafts, the fixed shafts penetrate through the connecting plates, and a second bearing is arranged at the penetrating position of the fixed shafts and the connecting plates.

Preferably, the anti-shaking clamping assembly comprises a third rectangular hole formed in one side of the baffle, a limiting plate is arranged in the third rectangular hole, one end of the limiting plate penetrates through one side inner wall of the first rectangular hole, one side of the screening box is fixedly connected with a first fixing plate, an inserting hole is formed in the top of the limiting plate, a second movable plate is arranged at the bottom of the first fixing plate, a second fixing plate is arranged below the second movable plate, one side of the second fixing plate is fixedly connected with one side of the screening box, the second fixing plate is connected with the second movable plate through a plurality of second compression springs, the top of the second movable plate is fixedly connected with an inserting plate, and the inserting plate penetrates through the first fixing plate.

Preferably, the top of picture peg is located the jack, and the equal fixedly connected with third handle in both sides of second fly leaf, the top fixedly connected with pull ring of baffle.

Compared with the prior art, the invention has the beneficial effects that:

(1) In operation, the vibrating motor is started, and the screening box is respectively and elastically connected with the supporting plate and the first supporting column through the supporting springs, so that the screening box shakes, materials are convenient to filter through the filter screen, and the filtering effect is better;

(2) Through the design of the rotating unit, the rotating plate is in rotating connection with the supporting plate, the first fixed disc is driven to move, the limiting column is separated from the limiting hole, the extension spring is in a stretching state, limitation on the position of the sliding block is relieved, the sliding block is driven to move downwards through the first handle, the top end of the sliding block is not located in the clamping groove any more, the fixed relation between the rotating plate and the second supporting column is relieved, and the rotating plate can rotate relative to the supporting plate;

(3) The push plate is driven to move upwards through the hydraulic telescopic cylinder, and then the push plate is used for driving the rotary plate to move, so that the height of the rotary plate is changed, the screening box is inclined, and meanwhile, the rotary plate is contacted with the bottom of the supporting plate, so that the rotary plate is fixed between the supporting plate and the push plate, and the position of the rotary plate is fixed;

(4) The second compression spring is in a compression state by driving the second movable plate to move downwards, so that the inserting plate is separated from the inserting hole, limitation on the position of the limiting plate is relieved, the limiting plate is driven to move, the limiting plate is separated from the third rectangular hole and the screening box, detachment of the limiting plate is completed, limitation on the position of the baffle is relieved, the baffle is driven to move upwards, the baffle is separated from the discharging hole and the first rectangular hole, the discharging hole is opened, the screening box is vibrated by starting the vibrating motor, substances which do not pass through the filter screen in the screening box are discharged through the discharging hole and the guide groove, the substances which do not pass through the filter screen are conveniently taken out, and practical operation is facilitated;

(5) Through drive screw post rotation for the height of layer board changes, and then makes the rotor plate can be fixed at different altitudes by push pedal and layer board centre gripping, and then can change the inclination of screening case, before the drive screw post rotation, drives first fly leaf and reciprocates, makes the gear no longer be located the gear downthehole, and first compression spring is in compression state, after the screw post rotation, through first compression spring drive first fly leaf downwardly moving, makes the gear insert the gear downthehole, and then avoids the screw post to rotate because of non-human factor.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.

In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a second schematic diagram of the overall structure of the present invention;

FIG. 3 is a schematic view of a partial enlarged structure at A in FIG. 1;

FIG. 4 is a schematic view of a partial enlarged structure at B in FIG. 2;

FIG. 5 is a schematic view of a screening box according to the present invention in partial cross-section;

FIG. 6 is a schematic view of a rotary unit according to the present invention;

FIG. 7 is a schematic view of the tilt angle lift adjustment assembly of the present invention;

FIG. 8 is a schematic view of a second support column of the present invention in cross-section;

in the figure: 1. a base; 2. a screening box; 3. a mounting hole; 4. a filter screen; 5. a discharge hole; 6. a first rectangular hole; 7. a baffle; 8. a guide groove; 9. a first collection box; 10. a discharge pipe; 11. a second collection box; 12. a vibration motor; 13. a support plate; 14. a first support column; 15. a rotating plate; 16. a second support column; 17. a hydraulic telescopic cylinder; 18. a push plate; 19. a supporting plate; 20. a support spring; 21. a clamping groove; 22. a groove; 23. a slide block; 24. a second rectangular hole; 25. a first handle; 26. a limiting hole; 27. a through hole; 28. a limit column; 29. a tension spring; 30. a first fixed plate; 31. an anti-skid sleeve; 32. a threaded column; 33. a first bearing; 34. fixing the column; 35. a first movable plate; 36. a support ring; 37. a second fixed disk; 38. a first compression spring; 39. a gear; 40. a gear hole; 41. a second handle; 42. a connecting plate; 43. a fixed shaft; 44. a second bearing; 45. a third rectangular hole; 46. a limiting plate; 47. a first fixing plate; 48. a second movable plate; 49. a second fixing plate; 50. a second compression spring; 51. a jack; 52. inserting plate; 53. a pull ring; 54. and a third handle.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The first embodiment is shown in fig. 1 to 8, the invention comprises a base 1, a screening box 2 is arranged above the base 1, a mounting hole 3 is formed in the inner wall of the bottom of the screening box 2, a filter screen 4 is arranged in the mounting hole 3, a discharging hole 5 is formed in the inner wall of one side of the screening box 2, a first rectangular hole 6 is formed in the inner wall of the top of the discharging hole 5, a guide chute 8 matched with the discharging hole 5 is formed in one side of the screening box 2, a baffle 7 is arranged in the discharging hole 5, the top end of the baffle 7 penetrates through the first rectangular hole 6, the baffle 7 is connected with the screening box 2 through an anti-shake clamping assembly, a discharging pipe 10 is arranged at the bottom of the screening box 2, vibrating motors 12 are arranged at two sides of the screening box 2, a first collecting box 9 and a second collecting box 11 are arranged at the top of the base 1, and a shake tilting assembly is arranged at the bottom of the screening box 2;

the shake slope subassembly is including setting up in backup pad 13 and the rotor plate 15 of screening case 2 below, backup pad 13 and rotor plate 15 are all connected with screening case 2 through a plurality of supporting springs 20, the bottom of backup pad 13 is connected through two first support columns 14 with base 1, backup pad 13 and rotor plate 15 are connected through rotating the unit, the top fixedly connected with two second support columns 16 of base 1, second support column 16 and rotor plate 15 are through preventing changeing the dead subassembly and be connected, the top of base 1 is equipped with hydraulic telescoping cylinder 17, the top of hydraulic telescoping cylinder 17 is equipped with push pedal 18, push pedal 18 is located the bottom of rotor plate 15, the top of rotor plate 15 is equipped with layer board 19, layer board 19 and base 1 are connected through inclination lift adjustment subassembly.

In the second embodiment, as shown in fig. 6 and 8, the anti-rotation locking assembly includes two clamping grooves 21 formed at the bottom of the rotary plate 15, a groove 22 is formed at the top of the second support column 16, a sliding block 23 is arranged in the groove 22, a second rectangular hole 24 is formed in one side inner wall of the groove 22, a first handle 25 is fixedly connected to one side of the sliding block 23, a limit hole 26 is formed in one side of the sliding block 23, a through hole 27 is formed in one side inner wall of the groove 22, a first fixed disk 30 is arranged on one side of the second support column 16, a limit post 28 is fixedly connected to one side of the first fixed disk 30, an extension spring 29 is sleeved outside the limit post 28, two ends of the extension spring 29 are fixedly connected with the second support column 16 and the first fixed disk 30 respectively, the top end of the sliding block 23 is positioned in the clamping groove 21, the first handle 25 penetrates through the second rectangular hole 24, one end of the limit post 28 penetrates through the through hole 27, one end of the limit post 28 is positioned in the limit hole 26, an anti-rotation sleeve 31 is sleeved outside the first fixed disk 30, the rotary unit includes a connecting plate 42 symmetrically arranged at two sides 15, a connecting plate 42 and a fixed shaft 43 fixedly connected to the two sides of the rotary plate 43, and a fixed shaft 43 penetrates the fixed shaft 43, and the fixed shaft 43 is fixedly connected to the fixed shaft 43;

through the design of rotation unit for rotor plate 15 rotates to be connected relative backup pad 13, through driving first fixed disk 30 removal, makes spacing post 28 break away from spacing hole 26, and extension spring 29 is in tensile state, releases the restriction to slider 23 position, and then drives slider 23 through first handle 25 and moves down, makes the top of slider 23 no longer be located draw-in groove 21, releases the fixed relation between rotor plate 15 and the second support column 16, makes rotor plate 15 can rotate relative backup pad 13.

In the third embodiment, as shown in fig. 2, fig. 4 and fig. 7, the tilt angle lifting adjusting assembly includes a threaded column 32, the threaded column 32 penetrates through the supporting plate 19, the threaded column 32 is connected with the supporting plate 19 in a threaded manner, the bottom end of the threaded column 32 is connected with the base 1 through a first bearing 33, the top of the base 1 is fixedly connected with a fixed column 34, the fixed column 34 penetrates through the supporting plate 19, a supporting ring 36 is sleeved outside the fixed column 34, the supporting ring 36 is fixedly connected with the fixed column 34, the top of the fixed column 34 is fixedly connected with a second fixed disk 37, a first movable plate 35 is arranged above the supporting plate 19, the fixed column 34 penetrates through the first movable plate 35, a first compression spring 38 is sleeved outside the fixed column 34, two ends of the first compression spring 38 are respectively fixedly connected with the first movable plate 35 and the second fixed disk 37, a gear hole 40 is formed in the top of the first movable plate 35, a gear 39 is fixedly connected with the top of the threaded column 32, the bottom of the first movable plate 35 is contacted with the top of the supporting ring 36, the gear 39 is positioned in the gear hole 40, and a second hand 41 is arranged on the threaded column 32;

through driving screw post 32 rotation for the height of layer board 19 changes, and then makes rotor plate 15 can be fixed at different altitudes by push pedal 18 and layer board 19 centre gripping, and then can change the inclination of screening case 2, before driving screw post 32 rotation, drive first fly leaf 35 and move up, make gear 39 no longer be located gear hole 40, first compression spring 38 is in compressed state, after screw post 32 rotation is accomplished, drive first fly leaf 35 through first compression spring 38 and move down for gear 39 inserts in gear hole 40, and then avoid screw post 32 to rotate because of non-human factor.

In the fourth embodiment, based on the first embodiment, as shown in fig. 1, 3 and 5, the anti-shake clamping assembly includes a third rectangular hole 45 opened at one side of the baffle 7, a limiting plate 46 is provided in the third rectangular hole 45, one end of the limiting plate 46 penetrates through one side inner wall of the first rectangular hole 6, a first fixing plate 47 is fixedly connected to one side of the screening box 2, an inserting hole 51 is provided at the top of the limiting plate 46, a second movable plate 48 is provided at the bottom of the first fixing plate 47, a second fixing plate 49 is provided below the second movable plate 48, one side of the second fixing plate 49 is fixedly connected with one side of the screening box 2, the second fixing plate 49 and the second movable plate 48 are connected through a plurality of second compression springs 50, the top of the second movable plate 48 is fixedly connected with an inserting plate 52, the inserting plate 52 penetrates through the first fixing plate 47, the top of the inserting plate 52 is positioned in the inserting hole 51, both sides of the second movable plate 48 are fixedly connected with a third handle 54, and the top of the baffle 7 is fixedly connected with a pull ring 53;

through driving second fly leaf 48 to move down for second compression spring 50 is in compression state, and then makes picture peg 52 break away from jack 51, remove the restriction to limiting plate 46 position, and then drive limiting plate 46 removes, make limiting plate 46 break away from third rectangular hole 45 and screening case 2, accomplish the demolish of limiting plate 46, simultaneously remove the restriction to baffle 7 position, and then drive baffle 7 moves up, make baffle 7 break away from discharge hole 5 and first rectangular hole 6, and then open discharge hole 5, through starting vibrating motor 12, make screening case 2 vibrate, and then make the material that does not pass through filter screen 4 in the screening case 2 discharge through discharge hole 5 and baffle box 8, be convenient for take out the material that does not pass through filter screen 4, convenient actual operation.

Working principle: during operation, the vibration motor 12 is started, the screening box 2 is respectively and elastically connected with the supporting plate 13 and the first supporting column 14 through the supporting springs 20, so that the screening box 2 shakes, materials are convenient to filter through the filter screen 4, the filtering effect is better, the rotating plate 15 is in rotary connection with the supporting plate 13 through the design of the rotating unit, the limiting column 28 is separated from the limiting hole 26 through driving the first fixed disc 30 to move, the stretching spring 29 is in a stretching state, the limitation on the position of the sliding block 23 is relieved, the sliding block 23 is driven to move downwards through the first handle 25, the top end of the sliding block 23 is not positioned in the clamping groove 21 any more, the fixed relation between the rotating plate 15 and the second supporting column 16 is relieved, the rotating plate 15 can rotate relative to the supporting plate 13, the pushing plate 18 is driven to move upwards through the hydraulic telescopic cylinder 17, and then the push plate 18 drives the rotary plate 15 to move so that the height of the rotary plate 15 is changed, thereby tilting the screening box 2, and simultaneously the rotary plate 15 contacts with the bottom of the supporting plate 19, so that the rotary plate 15 is fixed between the supporting plate 19 and the push plate 18, the position of the rotary plate 15 is fixed, the second movable plate 48 is driven to move downwards, the second compression spring 50 is in a compressed state, and then the plugboard 52 is separated from the jack 51, the limit on the position of the limit plate 46 is released, the limit plate 46 is driven to move, the limit plate 46 is separated from the third rectangular hole 45 and the screening box 2, the detachment of the limit plate 46 is completed, the limit on the position of the baffle 7 is released, the baffle 7 is driven to move upwards, the baffle 7 is separated from the discharge hole 5 and the first rectangular hole 6, and then the discharge hole 5 is opened, the screening box 2 is vibrated by starting the vibrating motor 12, and then make the material that does not pass through filter screen 4 in the screening case 2 pass through discharge hole 5 and baffle box 8 discharge, be convenient for take out the material that does not pass through filter screen 4, make things convenient for actual operation, rotate through drive screw post 32, make the height of layer board 19 change, and then make rotor plate 15 can be fixed at different altitudes by push pedal 18 and layer board 19 centre gripping, and then can change the inclination of screening case 2, before the drive screw post 32 is rotatory, drive first fly leaf 35 moves up, make gear 39 no longer be located gear hole 40, first compression spring 38 is in compression state, after the screw post 32 is rotatory, drive first fly leaf 35 moves down through first compression spring 38, make gear 39 insert in gear hole 40, and then avoid screw post 32 to rotate because of non-human factor.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a sieve separator that production activated alumina used, includes base (1), its characterized in that: the screening box is characterized in that a screening box (2) is arranged above the base (1), a mounting hole (3) is formed in the inner wall of the bottom of the screening box (2), a filter screen (4) is arranged in the mounting hole (3), a discharging hole (5) is formed in the inner wall of one side of the screening box (2), a first rectangular hole (6) is formed in the inner wall of the top of the discharging hole (5), a guide groove (8) matched with the discharging hole (5) is formed in one side of the screening box (2), a baffle (7) is arranged in the discharging hole (5), the top end of the baffle (7) penetrates through the first rectangular hole (6), the baffle (7) and the screening box (2) are connected through an anti-shaking clamping assembly, a discharging pipe (10) is arranged at the bottom of the screening box (2), vibrating motors (12) are arranged on two sides of the screening box (2), a first collecting box (9) and a second collecting box (11) are arranged at the top of the base (1), and a shaking inclination assembly is arranged at the bottom of the screening box (2).

The shaking tilting assembly comprises a supporting plate (13) and a rotating plate (15) which are arranged below a screening box (2), the supporting plate (13) and the rotating plate (15) are connected with the screening box (2) through a plurality of supporting springs (20), the bottom of the supporting plate (13) is connected with a base (1) through two first supporting columns (14), the supporting plate (13) and the rotating plate (15) are connected through a rotating unit, two second supporting columns (16) are fixedly connected to the top of the base (1), the second supporting columns (16) and the rotating plate (15) are connected through an anti-rotation locking assembly, a hydraulic telescopic cylinder (17) is arranged at the top of the base (1), a pushing plate (18) is arranged at the bottom of the rotating plate (15), a supporting plate (19) is arranged above the rotating plate (15), and the supporting plate (19) is connected with the base (1) through an inclination angle lifting adjusting assembly;

the anti-rotation locking assembly comprises two clamping grooves (21) formed in the bottom of the rotating plate (15), a groove (22) is formed in the top of the second support column (16), a sliding block (23) is arranged in the groove (22), a second rectangular hole (24) is formed in the inner wall of one side of the groove (22), and a first handle (25) is fixedly connected to one side of the sliding block (23);

a limiting hole (26) is formed in one side of the sliding block (23), a through hole (27) is formed in the inner wall of one side of the groove (22), a first fixed disc (30) is arranged on one side of the second support column (16), a limiting column (28) is fixedly connected to one side of the first fixed disc (30), an extension spring (29) is sleeved outside the limiting column (28), and two ends of the extension spring (29) are fixedly connected with the second support column (16) and the first fixed disc (30) respectively;

the inclination angle lifting adjusting assembly comprises a threaded column (32), the threaded column (32) penetrates through the supporting plate (19), the threaded column (32) is connected with the supporting plate (19) in a threaded mode, the bottom end of the threaded column (32) is connected with the base (1) through a first bearing (33), the top of the base (1) is fixedly connected with a fixing column (34), and the fixing column (34) penetrates through the supporting plate (19);

the outside cover of fixed column (34) is equipped with supporting ring (36), supporting ring (36) and fixed column (34) fixed connection, the top fixedly connected with second fixed disk (37) of fixed column (34), the top of layer board (19) is equipped with first fly leaf (35), fixed column (34) runs through first fly leaf (35), the outside cover of fixed column (34) is equipped with first compression spring (38), the both ends of first compression spring (38) respectively with first fly leaf (35) and second fixed disk (37) fixed connection, gear hole (40) have been seted up at the top of first fly leaf (35), the top fixedly connected with gear (39) of screw thread post (32);

anti-shake joint subassembly is including setting up third rectangular hole (45) in baffle (7) one side, be equipped with limiting plate (46) in third rectangular hole (45), one end of limiting plate (46) runs through one side inner wall of first rectangular hole (6), jack (51) have been seted up at one side fixedly connected with first fixed plate (47) of screening case (2) the top of limiting plate (46), the bottom of first fixed plate (47) is equipped with second fly leaf (48), the below of second fly leaf (48) is equipped with second fixed plate (49), one side of second fixed plate (49) is connected with one side fixed of screening case (2), second fixed plate (49) and second fly leaf (48) are connected through a plurality of second compression springs (50), the top fixedly connected with picture peg (52) of second fly leaf (48), and picture peg (52) run through first fixed plate (47).

2. A screening apparatus for use in the production of activated alumina as claimed in claim 1, wherein: the top of slider (23) is located draw-in groove (21), and first handle (25) run through second rectangular hole (24), and through-hole (27) are run through to one end of spacing post (28), and the one end of spacing post (28) is located spacing hole (26), and the outside cover of first fixed disk (30) is equipped with antiskid cover (31).

3. A screening apparatus for use in the production of activated alumina as claimed in claim 2, wherein: the bottom of the first movable plate (35) is contacted with the top of the supporting ring (36), the gear (39) is positioned in the gear hole (40), and the threaded column (32) is provided with a second handle (41).

4. A screening apparatus for use in the production of activated alumina as claimed in claim 1, wherein: the rotating unit comprises connecting plates (42) symmetrically arranged on two sides of the rotating plate (15), the connecting plates (42) are fixedly connected with the rotating plate (15), fixed shafts (43) are fixedly connected to two sides of the supporting plate (13), the fixed shafts (43) penetrate through the connecting plates (42), and second bearings (44) are arranged at the penetrating positions of the fixed shafts (43) and the connecting plates (42).

5. A screening apparatus for use in the production of activated alumina as claimed in claim 4, wherein: the top of picture peg (52) is located jack (51), and the both sides of second fly leaf (48) are all fixedly connected with third handle (54), and the top fixedly connected with pull ring (53) of baffle (7).